The following summaries cover "significant" or widespread thunderstorm outbreaks and tornadoes. Tornadoes, hail, wind damage, and flooding impacts can be found in these summaries. If the event was focused mainly on flooding it will be found under the "Flooding" section.
July 6, 2014: Initial storm survey results from two tornadoes in northern Tama and southern Grundy County. These tornado tracks were updated and additional tracks added after this report was written. Please see the 2014 Iowa Tornadoes Page for updated information.
June 30, 2014: Multiple rounds of severe thunderstorms produced seven tornadoes (four documented after this writeup was published), baseball size hail driven by powerful straight-line winds, and extensive flash flooding. Please see the 2014 Iowa Tornadoes Page for updated tornado information.
May 11, 2014: A line of thunderstorms generated several tornadoes in central Iowa, one of which hit Lake Panorama.
April 27, 2014: A complex of thunderstorms produced two swaths of straight-line wind damage over southeastern Iowa, including the Oskaloosa and Ottumwa areas. It then went on to produce a tornado in far northern Wapello County that tracked into Keokuk County.
May 1, 2012: Wind event over Story County and the city of Ames.
April 14, 2012: The initial Creston tornado storm survey summary, including radar imagery and photos. This track was modified after the initial survey--please see the 2012 tornado page for the updated track.
The following summaries cover "significant" or widespread flooding. River and flash flooding can be found in these summaries. If the flooding event accompanied severe thunderstorms or tornado outbreaks, it will likely be included in that event's summary under the "Thunderstorms / Tornadoes" section.
September 21-24, 2016: Multiple rounds of heavy rain impacted northern and central Iowa over the course of four days in mid to late September, resulting in widespread flash flooding and record to near-record flooding in the Cedar River basin.
Summer 2010: Service assessment of the 2010 central Iowa floods.
Summer 2008: Service assessment of the 2008 flooding in central and eastern Iowa.
The following summaries cover "significant" or widespread winter storms. Heavy snow, sleet, freezing rain, and blizzards can be found in these summaries. If the event focused on wind chills, it will be found under the "Heat / Cold" section.
Scroll down the page for year, or go directly:
March 23-24, 2016: A strong spring storm system dropped up to a foot of snow in northern Iowa.
May 1-3, 2013: A rare May snowstorm brought over a foot of snow to portions of central Iowa. It was the strongest May snowstorm to ever hit the state.
February 26-28, 2013: A multi-day snowstorm dropped over a foot of snow across east-central Iowa in late February.
December 19-20, 2012: A meteorological review of the powerful Iowa blizzard that struck Iowa just before the holidays. Heavy, wet snow coated power lines and trees, which snapped as winds increased to 50 to 60 mph.
The following summaries cover "significant" or widespread high heat or extreme cold. Dangerous wind chills and life threatening heat indices can be found in these summaries. If the extreme temperatures were associated with a summer or winter storm, it may be found under the "Thunderstorms & Tornadoes" or "Winter" sections. These events tend to more "rare" compared to others, and has not been broken into yearly sections. If wished, that can be done here also (copy and past a snippet of yearly code from another section, then repeat as needed).
March 2012: Des Moines saw an unprecedented record warm March that would eventually propel 2012 into the record books as the warmest year on record for Des Moines.
March 2012: Facts about the unprecedented record warm March in Waterloo.
The following summaries cover events that don't fall under the other categories - such as high wind events (not associated with thunderstorms). Other atmospheric events, such as auroras, may be found here.